Transmission brake



f. so

.raientedffsept 7,' l192e.y 1

UNjlAfT-E'u' s TaTizs` PATENT oFFicE;

y PERRY L rii'NNEY, or 'ifmiiciiiaiivniaiva,v As'siGNon rro GENERAL -Mo'ronscon;

1703412101501# DETROIT, MICHIGAN, A conrona'rioivor DELAWAen k rrtiiivrsiifzissioiv BRAKE.'

Application filed ,Hay 21.,

This invention relates tobrakes, andlis.

illustrated as v,embodied .;in an emergency brake substantially identical with thebrakes at present furnished on Oakland. andOlds cars. f

An object-of the invention is fto guard Q against any accumulation of dirt or water between the drum and friction band .or shoe,

preferably by arranging a split band tO l l surround the drum with its ends at the bottom of the drum, so`that dirt'and waterwill fall freely between' the ends of the band;V Thereis some novelty.l also in the' means for' 'supporting the band .b'uteiiicient`4 arrangement of operatingv parts, embodying a novel' spingglink connecting an arm of a-driver-operated b'ellcrank lever -to a band=operating lever projecting laterl0 all of thetrans'x'nission.

he above .and otherobjects and vfeatures of the invention, -includin various novel coinbinations of'fpai'ts fan desirable articular constructions, will b'e apparent om the "following description of one illustrative .embodiment shown inl the accompanying;

" drawings,'in which: l f Figure 1 isa" side elevation, partlybroken away, of a transmission and brake; and

Figure 2 is a' rear elevation ofthe 'transmission and brake'.`

In the arrangement selectedior illustra tion, and which is "at ment onthe Oaklan transmisaion` 1 0 has a rejecting shaft12 v to lwhich is secured ai Iliub 14 `'carrying a pressed metal brake drum 16.1. a j Y According to one feature'of the presentv resent regular equipdfand 0lds"cars, the

cumulationjk of` dirt `oi' waterbetwee'n it as. asplit friction b'and,isarr'an d sur.- rounding the' drum and 'withitsen s at ,the bottom of -the drum. The bpposite ends olfthe band `18 are' connected toanovelibaidoperating sheet-metal bellcrank lever rgarm 20 on opposite sidesof itsj'fulcrumfwhich *ay be a' pivot '22 carried by-a Urshaped stamping 24 secured to thetransini'ssion 10 jects laterally at -the right of the' transmis sion.ll The band 18 is yieldinglyuredavvay-y the drum'by 4a pair of spring ngers v28 i from looped abouttwo of the tapscrews which yhold the cover 5320i the transmissionfl,

^ Another feature-relates -to i an inexpensive invention,l and in order-tov prevent 4the ae` .A Tilgrhand drive' (for export); and the drum'16',the ,band or'shoegl', shown .'bytwo"tap screws 261' Thai-lever 20 pro--vv i924. serial N0. 714,854.

A ldriver-operated `bellcrank lever 34,

"pivoted by a, bolt 3.6 on a boss ot the cover l32, is arranged withv an arm 38at right angles to the arm 20, 'and with a perforated portion' vertically above theA perforated end portion of the arm 20. A springlink is provided f `for connecting'the two arms, the illustrated arrangement including a. link 40 hooked-into the opening in'arrii 38 and threaded at 'its lower end to receive a cup-shaped member 42 having a flange or stop `44 to engagevone endof a.coil. spring 46,the spring being ggnfined' betweenthe stop 44 and the arml Arm- 20 is held'againstspring46 by a light tension spring 48 connected to a brack- 'et 50 which is L-shaped in cross-section, and -whicli is held by the bolt 3 6 and by one tap screw 30 in a position where it extends side of the driver-'operated lever. The bottom edgeof this bracket 'is formed withratchet teeth 52 engaging a pawl 54 vpivoted 'on the arm 38- and `controlledbyarod 56 extending to the top of lever 34 inthe usual manner.

Itwill be seen that* rocking lever 34' inl-l a counter'elockwise direction (Figure 1) compresses 'spring 46- to f apply the brake,

the brake being heldon as long as desired bypa'wl 54. Rocking" lever 34 in a clockiwise direction jallows 'the spring 48 and 'springiigers 28 to expand-,band 18 to' release the brake.` A

`A Ygreat advantage-of the brake shown is' thatpraetically all-,the parts, either 'as shown or by reversing them', can be used in arranging the brake with`lever 34 on the oppositeiside of the transmission, for cars with 1.' A brake comprising,infcombination, a

` transmissiom-"a' brake bandsurrounding the drum with its lendsat the bottom thereofgj.

o'wrsaid ydrunifl'tnd whichniember vis cori mi; abend "contractingmember` pivotallysup-- s orted r'omthe transmission at a-point bef 2. A brake Aas defined by claim l, in which there are two spring fingers holding -the brake band, and two tap screws securing the spring fingers and also serving as attaching means' for the cover of the transmission.

3. A brake comprising, in combinatiomeJ transmission, a drum and band at the end of the transmission, a'band-operating arm projeting at one side of the transmission, a bellorank lever'pivoted on the same side of the transmission and having an arm at right angles to the band-operating arm with a partin vertical alinement with a part of the band-operating arm, a'linl: pvoted to '2Q the arm'o the bellcrank lever and projectbetween the two arms; and a coil spring surrounding the link and confined between the -stop and the upper surface .ofthe bandl,

operating arm. ,l

4, A brakevas deined byclaim 3, in combination with a light tension spring holding the band-operating arm in engagement with the coil spring.

.5. A brake as defined by claim 3, in com-l bine-tion with a pavvlA carried by the arm of the bellcrank lever, and a' ratchetformed on the vertical part of a plate of L-shaped cross-section secured to the top of the transmission, and said arm.A

In testimony whereof I aiixmy signature.

l `PERRY L'. TENNEY.

projecting downwardly beside 

